Author: blass uri
Date: 23:26:34 08/29/99
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On August 29, 1999 at 21:20:43, Robert Hyatt wrote: >On August 29, 1999 at 18:17:13, Mogens Larsen wrote: > >>On August 29, 1999 at 15:22:41, Robert Hyatt wrote: >> >>>Ed doesn't either. And I wouldn't be surprised if everyone else doesn't spend >>>a lot of time on ponder=off games either. It is simply 'unnatural' to run a >>>program that way... and most of us would rather spend time tuning the program >>>in the state it will play games, not in some crippled state that a user might >>>use to play games. IE do we also tune for (a) tiny transposition tables; (b) >>>no opening book; (c) no databases (endgame); (d) modified user parameter >>>settings; (e) any other random thing a user might try??? >>> >>>IE I do my testing in the configuration that plays the best/strongest. Not in >>>configurations that someone might use "just because it is there..." >> >>I've been following the discussion with great interest and I have a couple of >>questions, mostly due to ignorance. >> >>If you play an engine-engine match on one computer with permanent brain on and a >>match with permanent brain off. What match would most likely be the best >>estimate of the difference in strength? What are the complications with >>permanent brain? Some suggest that it's the same for both, but there might be a >>difference prioritywise concerning processortime, or? >> >>Best wishes... >>Mogens > > >Neither, unfortunately. Here's why. > >Assume one null-move program and one non-null-move program. If you use ponder >mode, both will get 1/2 the machine basically. Which means that in essence, >the programs will be running on machines 1/2 the speed of the computer you are >using. That hurts a null-mover more, because reduced depth allows some critical >null-move failures that deeper depths 'fix'. So there, you get skewed results. I do not think that there is a rule that null movers earn more from time relative to non null movers and it may be depend in the program. I have no proof that Junior earn less from time relative to Null movers. Uri
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